Clarkcomanthus exilis (Rowe, Hoggett, Birtles & Vail, 1986)

Kogo, Ichizo, Fujita, Toshihiko & Kubodera, Tsunemi, 2019, Shallow-water Comatulids (Echinodermata: Crinoidea) from Ambon and Lombok Islands, Indonesia, Species Diversity 24, pp. 229-246 : 236

Clarkcomanthus exilis

( Rowe, Hoggett, Birtles, and Vail, 1986)

Oxycomanthus exilis Rowe et al., 1986: 251 , fig. 9a; Vail 1987: 554 (table), 557; Fabricius 1994: 1228 (table); Messing 1994: 239 (list); 1998b: 189 (table); 2007: 98; Rowe and Gates 1995: 149; Kirkendale and Messing 2003: 533; Kogo 2002: 11; Kogo and Fujita 2005: 335.

? Oxycomanthus exilis — Kogo 1998: 49, fig. 38.

Clarkcomanthus exilis — Summers et al. 2014: 336.

Material examined. 1 specimen. Ambon Is. NSMT E-8128 (1 specimen), Pombo I ., 10 m, November 28, 1992.

Description. Centrodorsal small, pentagonal in aboral view, 2 mm across, 0.2 mm thick, with about 10 minute cirrus sockets in 1 aligned row. Cirri V including 3 rudimentary ones, 12, up to 6 mm long. Cirrals smooth without aboral spine. Radials trapezoidal, in contact laterally. Rays in a plane. IBr 2: Ibr 1 trapezoidal, in contact laterally; Ibr 2 (axil) low pentagonal, free laterally. IIBr and IIIBr all 4(3+4). Arms presumably 34, 64 mm long, first syzygy at br 3+4. PII longest, 14 mm long, of 37 segments; combs of 8–9 nonconfluent teeth. Pinnule combs to P 1.

Distribution. First record in Indonesia; previously known from western, northern, and eastern Australia, Melanesia ( Rowe et al. 1986; Rowe and Gates 1995); Great Barrier Reef ( Vail 1987); Papua New Guinea ( Messing 1994); Micronesia ( Kirkendale and Messing 2003; Messing 2007); Japan ( Kogo 2002; Kogo and Fujita 2005). Depth range: 3–25 m ( Rowe et al. 1986).